FEATURES

? High Efficiency: ≥90

? Maximum Output Current: 3.5A

? Maximum Output Voltage: ±VVPS

? Actual Object Temperature Monitoring

? High Stability: 0.01°C

? High Precision

? High Reliability

? Zero EMI

? Compact Size

? 100 lead (Pb)-free and RoHS compliant

DESCRIPTION

The TECA2-xV-xV-DAH is an electronic module designed

for driving TECs (Thermo-Electric Coolers) with high

stability in regulating the object temperature, high energy

efficiency, zero EMI, and small package. Figure 1 is the photo

of an actual TECA2-xV-xV-DAH.

The module provides interface components for users to

configure desired object temperature range, i.e. set-point

temperature range; maximum voltage across TEC, i.e.

maximum TEC voltage; and the compensation network. The

compensation network compensates the high order thermal

load and thus stabilizes the temperature control loop.

It provides these functions: thermistor T-R curve linearization,

temperature measurement and monitoring, temperature

control loop status indication, TEC voltage monitoring, power

up delay, and shut down.

The TECA2-xV-xV-DAH comes with a high stability low

noise 2.5V voltage reference which can be used for setting the

desired object temperature by using a POT (Potentiometer) or

a DAC (Digital to Analog Converter). When using this

reference for setting the set-point temperature, the set-point

temperature error is independent of this reference voltage.

This is because the internal temperature measurement network

also uses this voltage as the reference, the errors in setting the

temperature and measuring the temperature cancel with each

other, setting the object temperature with higher stability. This

reference can also be utilized by an ADC (Analog to Digital

Converter), for the same reason, the measurement error will

also be independent of the reference voltage, resulting in a

more accurate measurement.

Figure 1 is the photo of the actual TECA2-xV-xV-DAH

controller. Figure 2 is the real size top view of the controller

showing the pin names and locations with the actual size. The

pin functions are shown in Table 1.